GB1340810A - Crane jib - Google Patents

Crane jib

Info

Publication number
GB1340810A
GB1340810A GB4496772A GB4496772A GB1340810A GB 1340810 A GB1340810 A GB 1340810A GB 4496772 A GB4496772 A GB 4496772A GB 4496772 A GB4496772 A GB 4496772A GB 1340810 A GB1340810 A GB 1340810A
Authority
GB
United Kingdom
Prior art keywords
section
flange
bearings
rollers
sept
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4496772A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Werk Ehingen GmbH
Original Assignee
Liebherr Werk Ehingen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Liebherr Werk Ehingen GmbH filed Critical Liebherr Werk Ehingen GmbH
Publication of GB1340810A publication Critical patent/GB1340810A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/707—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic guiding devices for telescopic jibs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

1340810 Telescopic crane jibs LIEBHERRWERK EHINGEN GmbH. 29 Sept 1972 [30 Sept 1971] 44967/72 Heading B8B A telescopic crane jib comprises a foot section 8, an intermediate section 9 and a head section 10 all of box-section. The intermediate section 9 has a lower flange 13 of V-shaped cross-section defining two outwardly facing surfaces 13 inclined at an angle a to the horizontal and supported on two bearings 11 on the foot section 8. Each bearing 11 comprises two abutment members, which may be slides but are here shown as rollers 17, carried on opposite ends of a two-armed lever 16 pivoted at 18. The distances a, b between the pivot 18 and the outer and inner rollers 17 being such that b/a = cos<2> ex/sin<2>ex. Two types of bearing 12 on the section 10 engaging the section 9 on its upper flange 20 are shown. On the left-hand-side a crowned roller 22 engages the angled surface 23 between the flange 20 and side flange 21. On the righthand-side a cylindrical roller 24 engages a rail 25 secured to the section 9. Alternatively, Fig. 8 (not shown), bearings 12 formed by two-armed levers (31) equipped with rollers (22) may engage a V-section upper flange (20) in a similar manner to the bearings 11 shown in Fig. 2 may be provided.
GB4496772A 1971-09-30 1972-09-29 Crane jib Expired GB1340810A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712148966 DE2148966C3 (en) 1971-09-30 1971-09-30 Telescopic boom, especially for road-traveling cranes

Publications (1)

Publication Number Publication Date
GB1340810A true GB1340810A (en) 1973-12-19

Family

ID=5821137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4496772A Expired GB1340810A (en) 1971-09-30 1972-09-29 Crane jib

Country Status (4)

Country Link
JP (1) JPS533534B2 (en)
DE (1) DE2148966C3 (en)
FR (1) FR2154629B1 (en)
GB (1) GB1340810A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4394108A (en) * 1977-12-21 1983-07-19 Mid-Continent Aircraft Corporation Front loader vehicle with telescoping boom

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2255251B1 (en) * 1973-12-20 1976-11-19 Creusot Loire
US4038794A (en) * 1975-10-28 1977-08-02 The Warner & Swasey Company Boom assembly
DE3042993A1 (en) * 1980-11-14 1982-07-01 Fried. Krupp Gmbh, 4300 Essen Telescopic crane jib with plastics bearings - is of angular cross=section at bottom and radiused at top
FR2600384A1 (en) * 1986-06-19 1987-12-24 Lamy Perret Paul Guidance device for a telescopic arm, especially for a manipulator
ATE123743T1 (en) * 1991-02-11 1995-06-15 Liebherr Werk Ehingen TELESCOPIC BOOM FOR VEHICLE CRANES OR THE LIKE.
DE9308993U1 (en) * 1993-06-16 1993-08-12 Ec Engineering + Consulting Spezialmaschinen Gmbh, 89079 Ulm Telescopic boom
DE4328662A1 (en) * 1993-08-26 1995-03-02 Krupp Ag Hoesch Krupp Jib profile and/or articulated-tip profile
DE4427192C2 (en) * 1994-08-01 1997-07-10 Franz Ehrenleitner Closed profiles
DE19624312C2 (en) * 1996-06-18 2000-05-31 Grove Us Llc Telescopic boom for mobile cranes
JP2005112514A (en) * 2003-10-06 2005-04-28 Tadano Ltd Expansion boom

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029954A (en) * 1959-02-24 1962-04-17 William H Grant Adjustable boom crane
DE1281651C2 (en) * 1966-06-30 1975-02-13 Leo Gottwald KG, 4000 Düsseldorf TELESCOPIC RETRACTABLE AND EXTENDABLE CRANE BOOM
DE1531174A1 (en) * 1967-09-22 1970-04-16 Demag Bagger & Kran Gmbh Telescopic boom for cranes and excavators with at least one retractable and extendable extension piece
DE1531178A1 (en) * 1967-12-13 1969-11-27 Demag Bagger & Kran Gmbh Telescopic boom for cranes and excavators with at least one extension piece that can be retracted and extended on sliding blocks
JPS4836028B1 (en) * 1969-08-21 1973-11-01
DE2009298A1 (en) * 1969-10-30 1971-05-06 Institut fur Fordertechnik Leipzig, χ 7034 Leipzig Guide for telescopic booms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4394108A (en) * 1977-12-21 1983-07-19 Mid-Continent Aircraft Corporation Front loader vehicle with telescoping boom

Also Published As

Publication number Publication date
FR2154629B1 (en) 1975-03-14
DE2148966B2 (en) 1978-03-30
DE2148966C3 (en) 1978-11-23
JPS4862155A (en) 1973-08-30
FR2154629A1 (en) 1973-05-11
DE2148966A1 (en) 1973-04-05
JPS533534B2 (en) 1978-02-07

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee